Sound-reproducer.



A. N. HERMAN. scum REPRonucEn. APPucmon'mso nov. 24'. isos;

Patent-ea July 6,

In Ven tot SHN Y.

-, With e'ss's :1;

Attorney extent of the opening oi' the ports i0.

A. link 1S is connected at one end to an eve if-l vsecured to the plate 13 and at its other end to the lever 2() which carries the stylus. The lever is pivoted at- 21 to a lug or lugs 22 carried by a floating weight 23 which is pivoted at 2l to a .lug 25 carried b v the tlange 5. This weight moves freel)v up and down to permit the st vlus ll' to follow irregularities'in the contour of the record surface 2. The cup Qiis provided with a small. aperture QG to permit the link. 1S to move freely' up and down but the clearance is slight, so as not to all'ectthe suctionthrough the ports l0.

The operation ot' the device is as follows:

The body l being held inthe tra velin'jl carrier arm of the phonograph 'with the stylus li' in operative position vupon the phonograph or sound record u, suction is applied to the tube l? which produces aA downward stress upon the plate 13 and slightl;v opens the ports it). This stress is then balanced by the upward pressure ot the spring 1G so that 'the ports l0 remain slightly pen allowing the passage ot' a stream of air. Als

'the reprodu'cer stylus 1T is moved upward by an elevation of the sound record groove it draws the link 1S downwardl)v and causes the plate 13 to dex, thereby increasingfhe open` ing;r ot' the ports l0 and allowing a greater flow of air from the sound chamber 2 into the exhaust pipe l2. As the st vlus 1T passes over the elevation and descends into a de.-

pression. the elasticit;v of the plate 13 andr ot the spring` 1G decreases the extent ot' openingr of the ports 10. therebyv cutting down the tlow ot air. lie-varying ot vthe extent of opening` ot the ports l0 is tlius"4 eliected in exact accordance with the ele vations and depressions of the sound record groove and the result is to produce sounds which are representative of said elevations and depressions. and which. before stated.

are of verv perfectqualit;v and. may be ot great volume.

Having now described. mj: inventionfwlnit lugliters Patent .is as follows:

l. ln a sound reproducer. the combination of a hollow bofglv formed with chambers,

communicating through one or more ports', .a Celluloid i'ilate seated on the ports, and means 'tor lli-Jing said plate to vary ther extent of opening ot said ports, substantially as set forth.

Q. ln a sound reprtalncer comprising a sound chamber having one or more ports a valve seated upon said ports the seated portion or portions of said valve being composed vot material which may be rendered plastic b v heat. and means tor operating said valve to variY the extent ofpening of said ports. substantially as sctforth.

In a sound reliroduc'er, the comb1nameans for producing a flow ot elastic fluid through said ports, a valve seated upon said ports, the seated portions of said valve being composed of material which may beren dered. plastic by ieat., and 'means representative of sound vibrations for operating said valve to vary the extent oit' openingl of said ports. substantialliT as set forth.- 1

el. In a sound regnoducern the combination of a hollow bodjr'torined with a pair o chambers connnunieating through one or more ports, a valve tor varying the extent of opening ot' said ports, a weight pivotallv connected to said body, a stylus lever pivoted to said weight and connected to said valve in such a waviY that upward movement of the stylus causes movement of said valve away from the ports. substant-iallvT as set for h.

ln a sound reproducer, the combination. 'of a hollow bodyY containing chambers communicating through one or more ports. a plate ofelastic material seated upon the. ports, said plate being lxedly mounted atone edge and free at the opposite edge, a st vlus .and a lever connection. between said st vlus and plate, saidy connection.- enacting with said plate intermediate the said edges thereof. substantially as described.

6. In a sound reproducer, the combination of a hollow body containing chambers communicating through one or -inore ports, a plate of material which inav be rendered plastic by heat seated upon the ports, said plateibeing vedlv mounted at one edge and tree at the opposite edge, a stylus.l and a lever connection between said stylus and plate, said connection enacting with said plate intermediate the said edges thereof, sul intialljv as described.

7. In aV sound reproducer, the combination of a hollow bodj.' containing chambers coinmunicating through one or more ports, a plate of Celluloid seated upon the portsfsaid plate being xediy mounted at one edgeand tree at the opposite edge, a stylus.,1 and a lever connection between said stylus and plate` said connection 'coacting with saidv plate. intermediate the said edges thereof, substantiallv as described.

S. In a sound reproducer. t-ii'e combination of a hollow body containing chambers communicating through one oi more ports, -a plate of elastic material seated upoiji'ther ports. said plate being fixedlv inmintetlguat one edge and free at the opposite edge, a spring pressing on said plate to press it into or toward a closed position .a stylus, and a lever connection between said stylus land plate, said connectionv coacting with' said plate intermediate the said edges thereof, substant'iall)T 'as described.

9. ln a sound reproducer, the combination of a heilt-iw body containing ychambers coinmunicating through one tir-,more ports; l9.

plate of elastic material seated upon the ports, said plate being xedly mounted at. one edge and free at the opposite edge, a weight pivotally connected to said body., a

stylus lever pivoted to said Weight and con-4 nected te said plate intermediate said edges f thereof, substantially as described.

l0. In a sound reproduoer, the Combiiiation-0f a hollow body formed with a pair of chambers 'communicating' through one or more ports, a valve for varying the extent of opening of said ports, a floating weight, a stylus lever pivoted to said weight and connected to Said yalve in such a way thatv upward movement of the stylus causes movement of said valve away from the ports,- substantially as described. -11. In a soundv reproducer, the combination of a hollow body formed withva pair of Chambers communicating through one or more ports, a valve for varying the extent of opening of said ports, a floating weight, a stylus lever-pivoted to said weight and connected to said valve in such away that upward movement of the stylus' Causes moVement of said valve Vdownwardly and-away from the ports, substantially as described.

l2. In a sound reproducen'the'combina-- tion of a hollow bodyv formed Withl apairof chambers communicating' through one or more ports, .one of such chambers opening int'o the atnfiosphe're, ayalve situated in the other of said chambers for varying the ex'- tent of vopening of said ports, a floating" weight, a Vstylus lever pivoted to said weight and connected to saidfvalvein such a Way thatupward movement of the 'stylus bcauses movement of said valve away' from the ports,

substantially as described.

This specification signed and' 'witnessedrthis 22nd day of November 1905.'

ALEXANDER N. PIERMAN. Witnesses:

, DEnos Homes,

Mn'o C. MAGARTHUR. 

